Oven illuminating device



Aug. 6, 1935. L. M. WORTH ETAL 2,010,618

OVEN ILLUMINAT I NG DEVI CE Filed March 19, 1954 2 Sheets-Sheet l@|-.1|nm.||q@`||| Aug. 6, 1935. 4 L.. M. WORTH ET AL OVEN `ILLUMINAI NGDEVI CE Filed March 19, 1954 2 Sheets-S'net 2 Patented Aug. 6, 1935 yUNITED STATES PATENT orifice OVEN' I LLUMNATING DEVICE Luella M. Worthand Homer E. King, Sidney, N. Y., assignors of one-sixth to George E.Hazard, Sidney,` N. Y., and one-sixth to Charles L. Hilsinger, Oneonta,N.Y.

Application March 19, 1934, Serial No, 716,412` 3 oiims, (o1. 24o-5)This invention relates to an improved device section on the plane ofline 'I-l of Figure 6, with for illuminating the interior of the oven ofa parts broken away. domestic cooking range to facilitate inspectionFigure 8 is a section on line 8 8 .of Figure 7; of the food being bakedtherein. and I The primary object of the present invention is Figure 9,is a section of the switch on line 9 9 5 to provide a simple andeicient device of the of Figure 7. above kind embodying an electric lampmounted Referring in detail to the drawings, indicates to illuminate theinterior of the o'ven, a switch a conventional type of electric domesticcooking for controlling the circuit of said lamp, and novel range havinga top plate E at one side provided 0 means including an operativeconnection between with the usual radiating heaters l, and provided 10said switch and the door of said `oven to auto.- at the other side witha heat-insulated oven 8 matically open the switch and break the circuithaving a front door 9 hinged at its lower end, of said lamp when saiddoor is` closed and to as indicated at i0, to swing outwardly anddownautornatically close the switchl and make the wardly to openposition. The door 9 has a suitacircuit of said lamp when said door isopened. ble bracket arm II to limit opening movement A further object isto provide a device of the thereof to a substantially horizontalposition, above kind which may be readily installed upon and yieldablemeans is provided to counterexisting cooking stoves with slightalteration of balance the door 9 so as to hold the latter closed thelatter, and wherein the lamp is readily acand to prevent sudden openingthereof. This eessible and removable for renewal althoughcounterbalancing means usually consists of a 20 effectively protectedagainst breakage under ordihelical tension spring I2 attached at one endto` nary conditions of use. o an angle bracket I3 secured to the stoveat one still further .object is to provide a device of side of andbeneath the bottom of the oven, the the above kind particularly adaptedfor installaother end of said spring being connected to the 2+ tion uponstoves Whose ovens are provided with stop arm II by `a. flexible member'or chain I4 25 outwardly and downwardly opening swinging extendingforwardly from spring I2 to and doors equipped with yieldablecounter-balancing around a guide pulley I5 and then upwardly to meansacting to hold the doors closed and to said arm II. Suitable heatingmeans,` not shown, res-ist sudden opening of the latter. is provided foroven 8, but disclosure thereof or Qther objects and features of theinvention of further details of the stove construction is not willbecome apparent from the following desoripmade because the same isunnecessary to an tion when considered in connection with theacunderstanding of the present invention. The companying drawings, inwhichzfeed wires I 6 and I6a and the return wire I'I for Figure 1 is aview of an electric cooking range the heating elements of the stove arediagram-` equipped with an oven illuminating device emmatically shown inFigure 1. A 35V bodying the present invention, the range being In theembodiment of the invention illustrated shown partly in plan and partlybroken away in'Figures l to 3 inclusive, a wall, preferably the and inhorizontal section. back wall, of the oven 8 is provided with an `Figure2 is a fragmentary vertical section on opening I8 over the outer side ofwhich is se@- 49 the plane of line v2-:2 of Figure 1, with lparts cureda plate I9 of insulating material having l0 broken away. means toremovably mount` an electric lamp 20 Figure 3 is an enlarged fragmentaryhorizontal thereon -so that said lamp is supported in the section of theconstruction shownin Fig. 1, showopening I 8 in position to direct itsrays into and ing details of the switch for controlling thecirilluminate the'interior of the oven. In Figure 1, cuit of the ovenilluminating lamp. the lamp mounting consists of a threaded socketFigure 4 is an enlarged fragmentary horizontal 2I arranged for receptionof the threaded base section showing a modified form of lamp and of anordinary lamp so that the lamp projects mounting therefor. i inwardlyfrom plate I9. If the lamp projects Figure 5 is a view similar to Fig. 4showing a into the oven when mounted in this way, itmay 59! fur-thermodified form of lamp and mounting be protected against breakage by asuitable therefor. transparent guard as indicated at 22. Mounted Figure6 is a view somewhat similar to Figure 1 on the back of the stovebeneath the bottom of showing a modified form .of switch and operatingoven A8 is a switch 23 for controlling the circuit of means therefor.lamp 20, said switch having a movable contact 24 5g Figure "l is anenlarged fragmentary vertical connected by wire 25 with oneterminal ofsocket 55 2 I, and a stationary contact 2B connected by wire 21 with thereturn wire il. The other terminal of socket 2! is connected by wire 28with the feed wire i9.

Attached to the tension spring l2 intermediate the ends of the latter isa lateral arm 29 having an aperture through which freely extends athreaded Stem 3Q on one end of vwhich is adjustably threaded a wing nut3l, the other end of said steam being attached to one end of a flexiblemember 32 whose other end is attached to the movable contact 24. Theexible member may be the movable wire of a Bowden wire control, but inthis form of the invention is shown as a bead chain passing forwardly:from arm 29 to and around a guide pulley 33, mounted on the front apronof the stove, and then extending rearwardly to the contact 24 to whichit is attached. A helical compression spring 3l! acts to yieldingly movethe contact 24 to its rearward circuit closing position in engagementwith contact 25 as shown by dotted lines in Figure 3, and contact. 23has an aperture in one end through which a bolt 35 loosely extends, thebolt 35 being threaded into an insulating base 36 fastened to the stoveand carrying contact 23, and the spring 34 encircling bolt 35 between aconductor strip 31 and the apertured end of contact 25S. The strip 31has wire 25 secured thereto, and the wire 21 is secured to a similarstrip 38 extending from contact 26.

In operation, opening of door 9 causes movement of stop arm H so as topull upon the chain I4 and stretch the spring i2, thereby causingforward movement of arm 29 and placing slack in chain 32. This slack istaken up by rearward movement of contact 2li under the action of spring34, and when such contact engages contact 23, the circuit of lamp 29 isclosed so that the latter is lighted for illuminating the interior ofthe oven. The arrangement is such that the contact 24 engages contact 2Ewhen the door 9 is only partially opened to an extent sufficient topermit inspection of the food in the oven, thereby making it unnecessaryto fully open the door in order to illuminate the oven and permit properinspection of the food. When the door 9 is closed, slack is placed inchain lll so as to permit contraction of spring i2, and this causesrearward movement of arm 29 so as to exert a pull on chain 32 and movethe contact 24 away from contact 26 against the action of the weakerspring 34, thereby opening the circuit of and extinguishing the lamp 29.The adjustment of stem 39 by means of nut 3i properly determines theposition of contact 24 relative to contact 26 when the oven door isclosed, and regulates the degree of opening of door 9 necessary to closethe circuit of lamp Z9. While it is preferred to move the Contact 24forwardly to circuit-opening position, rearward movement of contact 24may be utilized to open the circuit of lamp 29 by arranging contact 26in front of the free end of contact 24, in which case the pulley 33 maybe omitted by reversing the stem 30 and using the chain 32 as a directconnection between contact 24 and said stem 39.

In Figure 4, the plate l9a has a socket 2la hinged thereto as at 39, anda slim elongated 29a and socket 2 la to swing forwardly out of slot ISa;so that the lamp may be readily inserted or removed relative to saidsocket.

In Figure 5, spaced clips lil are carried by the plate lSb for retainingengagement with the end terminal caps 4I of a special cartridge type ofelectric lamp 29h, in which said caps are tted on the ends of a tubularglass body and connected by a straight iilament 42 disposed axially ofsaid body. The wires 25 and 28 are electrically connected to therespective clips 39 as at 43, and the lamp 2Gb is removably held by saidclips entirely within the opening or slot I8b in the oven wall.

In the embodiment shown in Figures 6 to 9 inclusive, a mercury tubeswitch 23a is pivotally mounted, by suitable means 45 on the sto-vebeneath the rear portion of the oven 8, for vertical rocking movement.Mie switch 23a has spaced contacts 2Lla adapted to be bridged by a bodyof mercury 26a, when said switch is tilted to lower the end thereofcarrying the contacts 24a, so as to close the circuit of oven lamp 29a.Wire 25ct connects one of the contacts 240, with one terminal of socket2id, and the other contact 29a, is connected to a return wire by wire21a, the other terminal of socket Zia being connected with a feed wireby -vvire 28m. Socket 2m is carried by plate iQa; secured over theopening Ia in a wall of the oven. In this embodiment of the invention, aBowden wire control operatively connects the switch 23d with the tensionspring i2 of the counterbalancing means for door 9, said controlcomprising a guide tube 66 secured to the stove beneath the oven andextending from a point adjacent spring I2 to a point adjacent the switch23a, and a flexible wire lll slidable in the tube i6 and having itsopposite ends respectively attached to the lateral arm 29a carried byspring i2 and to an end of switch 23a. The arm 29a, has an aperturethrough which loosely extends a threaded stem 39a attached at one end toan end of wire 4'! and having a wing nut 3la adjustably threaded on theother end thereof. It will be seen that when door 9 is closed the springi2 contracts and moves wire lil in a direction to tilt switch 23a sothat the mercury 26a leaves contacts 26a, thereby breaking the circuitof lamp 29a. On the other hand, when door 9 is opened, the spring I2 isstretched so that a pull is exerted on wire il in a direction to tiltswitch 23a in an opposite direction whereby the end carrying contacts24d is lowered. This causes the mercury 26al torun to this end andbridge contacts 24a, thereby closing the circuit of lamp 29a.

v It will be seen that the invention is simple and inexpensive tomanufacture, and may be readily installed so as to not detract from theappearance of the stove. Minor changes are contemplated within thespirit of the invention as claimed.

What we claim as new is:

1. In an electric cooking range, the combination with an oven having ahinged door mounted toI swing outwardly and -downwardly to openposition, and counterbalancing means for said door including a tensionspring and a flexible member connecting said spring with the door sothat said spring is placed under tension when the door is opened, of vanilluminating device for said oven comprising a lamp set in a wall of theoven, a switch for controlling the circuit of said lamp mounted upon therange beneath vthe bottom of said oven, and means including an operativeconnection between said switch and the tension spring of said doorcounterbalancing means to automatically open the switch and break thecircuit of said lamp when said door is closed and to automatically closethe switch and make the circuit of said lamp when said door is opened,said switch having a contact movable to circuit opening and circuitclosing positions and normally yieldingly moved to one of saidpositions, said operative .connection between the switch and the ovendoor acting to move said contact to its other position upon movementl ofthe door in one direction, and allowing movement ofl said contact to itsnormal position when the door is moved in the opposite direction.

2. In an electric cooking range, the combination with an oven having ahinged door mounted to swing outwardly and downwardly to open position,and counterbalancing means for said door including a tension spring anda flexible member connecting said. spring with the door so that saidspring is placed under tension when the door is opened, of anilluminating device for said oven comprising a lamp set in a wall of theoven, a switch for controlling the circuit of said lamp mounted upon therange beneath the bottom of said oven, and means including an operativeconnection between said switch and the tension spring of said doorcounterbalancing means to automatically open the switch and break thecircuit of said lamp when said door is closed and to automatically closethe switch and make the circuit of said lamp when said doorA is opened,a pulley mounted on the range beneath the front part of the oven, saidoperative connection including a flexible operating member passingaround said pulley and having one end attached to the tension spring ofsaid door counterbalancing means, the other end of said flexible memberbeing attached to a movable contact of said switch.

3. In an electric cooking range, the combination with an oven having ahinged door mounted to swing outwardly and downwardly to open position,and counterbalancing means for said door including a tension spring anda flexible member connecting said spring with the door so that saidspring is placed under tension when the door is opened, of anilluminating device for said oven comprising a lamp set in a wall of theoven, a switch for controlling the circuit of said lamp mounted upon therange beneath the bottom of said oven, means including an operativeconnection between said switch and the tension spring 0f said doorcounterbalancing means to automatically open the switch an-d break thecircuit of said lamp when said door is closed and to automatically closethe switch and make the circuit of said lamp when said door is opened, apulley mounted on the range beneath the front part of the oven, saidoperative connection including a iexible operating member passing aroundsaid pulley and having one end attached to the tension spring of saiddoor oounterbalancing means, the other end of said ileXible member beingattached to a movable contact of said Switch, said switch opening andclosing means further including spring means to normally yieldingly movethe movable contact of said switch to circuit closing position, andadjusting means for said exible member to regulate the normal circuitopening position of said movable contact when the oven door is closed.

LUELLA M. WORTH. HOMER E. KING.

